--- version: rssac002v3 service: m.root-servers.net start-period: '2019-03-23T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3183935501 dns-udp-queries-received-ipv6: 643393267 dns-udp-responses-sent-ipv4: 3009725273 dns-udp-responses-sent-ipv6: 617667789 dns-tcp-queries-received-ipv4: 153854907 dns-tcp-queries-received-ipv6: 39414425 dns-tcp-responses-sent-ipv4: 155178677 dns-tcp-responses-sent-ipv6: 39512745